Programmable Logic Controller — Summer 2023

03 control in the Industrial Automation.

Explain following Specification of PLC04 (1) Scan Time( 2) IO’s of PLC ( 3) Resolution (4) Network Protocols

Draw Functional block diagram of PLC and enumerate it in details

Draw and describe Rack/Slot based addressing format of PLC.

Draw and describe symbols used to prepare Ladder Logic Diagram (LLD)04 for PLC programming.

What are the needs of I/O Module for PLC operation? Explain Analog07 Input and Output module with neat sketch.

What is the demand of Special I/O Modules in PLC operation? Explain07 working of stepper motor type special module.

Describe operation of following electromagnetic control relay

03 (1) Latching relay (2) Contactor (3) Solenoid Valve.

Explain memory Image table of the PLC.

Prepare Ladder Logic Diagram (LLD) for latching of Motor start scheme.

What are the differences between counter and timer instruction? Explain

03 with suitable example.

Explain ADD, SUB, MUL and DIV instruction

Develop Ladder logic diagram for each of the following Boolean expressions using AND, OR, and NOT gates:

Y= (AB +C) (C D)

List 4 things to be considered for preventive maintenance of PLC

Draw and design LLD to generate square waveform with 30% duty cycle at digital output terminal when toggle switch is ON. Note the total time is 10 sec.

Prepare LLD to control Traffic light towards only North direction by Turning ON green Lamp for 25 sec, Next turning ON yellow Lamp for 307 sec, and finally turning ON Red Lamp for 45 sec. Repeat it continuously. Note at a time only one lamp to be ON.

The counter instructions of PLCs are normally retentive. What does you

eans by it?

Differentiate Ttimers versus Ttimers instruction with suitable ON OFF04 example

Develop LLD for conveyor belt system 1). Product in position (limit switch Lcontacts close). S1 2). The start button is pressed and the conveyor motor starts to move the product forward toward position A (limit switch Lcontacts open when S1 the actuating arm returns to its normal position) 3). The conveyor moves the product forward to position Aand stops (position detected by 8 off to-on output pulses from the encoder, which are counted by an up-counter). 4). Atime delay of 10 s occurs, after which the conveyor starts to move the product to limit switch Land stops (Lcontacts close when the S2 S2 actuating arm is hit by the product).

03 nonreturnable instruction? Describe it in brief.

Prepare LLD for COMPARE PLC Function that will energize a pilot light output anytime the value stored at Data_2 is not the same as that stored at Data_6.

Write a ladder program to transfer data in 7 registers starting from FR010007 to other 7 holding register starting from IR0200.

Enlist data handling Function. Describe for data move and rotate

03 instructions.

Prepare LLD for following. A FAN is to be STARTed and STOPed from any one of the three location.04 Each location has a START and STOP Button.

Construct an equivalent sequencer data table for the 4-steps of the mechanical drum-operated sequencer shown in the figure.07 ###############2